Air heating attachment fob vacuum



53%., 18, E934 L. AMQQ AIR HEATING ATTACHMENT FOR VACUUM CLEANERS Filed May 12, 1935 INVENTOR ATTORNEY Patented Dec. 18, 1934 UNITED STATES PATENT OFFICE Lloyd R. Amoo, Morristown, S. Dak.

Application May 12, 1933, Serial No. 670,805

1 Claim.

The object of the invention is to provide a device for use in connection with vacuum cleaners, whereby the latter may be converted into hair driers or means for delivering blasts of heated air for any purpose for which such may be desired; to provide a device of the kind indicated which may be readily attached to the hose conventionally used with vacuum cleaners when the latter are converted into blowers; and generally to provide an air heater which is of simple form and therefore susceptible of cheap manufacture.

With this object in view, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawing but to which embodiment the invention is not to be restricted. Continued use in practice may dictate certain changes or alterations and the right is claimed to make any which fall within the scope of the annexed claim.

In the drawing:

Figure 1 is an elevational view of the invention, showing the same applied to a conventional vacuum cleaner.

Figure 2 is. a central vertical sectional view through the nozzle constituting the invention.

Figures 3, 4 and 5 are sectional views on the planes indicated by the lines 33, 44 and 5-5 respectively of Figure 2.

Designed to be used as an attachment for a vacuum cleaner, such as that indicated at 10, and to be connected with the hose 11, usually connected to the discharge 12 of the cleaner blower, the invention consists of a nozzle comprising an angular casing 14, of which the shorter leg adjacent its free end is provided with a peripheral rib '15 functioning as a shoulder against which the end of the hose may abut, the latter being applicable over the free end of the shorter leg of the casing on which it is frictionally retained.

Ihe longer leg of the casing and which constitutes the nozzle proper carries the-heating element 16 which is in the form, preferably, of a coil of resistance wire wound with its convolutions separated, so that they may not be in contact, this coil itself being wound over a spider 17. The latter is of some heat resisting material, preferably some frangible material as porcelain and its web portions are of less radial extent than the interior diameter of the nozzle, except that at the extremities of the spider, these webs extend the full radial extent of the nozzle diameter, so that they may abut the interior wall surface of the nozzle and thus hold the spider axially of or centrally disposed in the nozzle. The body portion 18 of the spider is formed with a small bore for the reception of the single strand of the resistance wire, as indicated at 19,

and this strand is a continuation from one end of the resistance coil and is carried through the bore back to the remote end of the spider to electrically engage a plate 20 secured in the nozzle but insulated therefrom but carrying a binding post 21 with which one of the line terminals, as indicated at 22, is connected. The other end of the resistance wire is laid in the spider parallel with its axis and connects with a plate 23 similar to the plate 20 and similarly connected with a binding post 24 with which the other conductor 25 is connected.

The arbor is retained in position in the nozzle through the instrumentality of the ring cap 26, which is shouldered, as indicated at 27, to abut the end of the nozzle and at the same time overlap the webs of the spider, this ring cap being internally threaded as indicated at 28 for engagement with corresponding threads on the exterior of the nozzle. The ring cap retains the spider in place and thereby maintains efiective engagement between the extremities of the heating coil and the plates 20 and 23 which carry or are connected with the binding posts 21 and 24.

Access to the interior of the casing is provided through an opening normally closed by a removable plug 29, this plug being positioned at the angle between the legs of the casing.

Obviously when the connectors 22 and 25 are connected to a source of supply, the resistance coil on the spider will be heated and air driven through the hose l1 and through the nozzle will thus be brought into contact with the heated resistance between the webs of the spider, and issuing through the ring cap will be in a comparatively highly heated condition for use wherever such air is desired.

The invention having been described, what is claimed as new and useful is:

A device for the purpose indicated comprising a tubular member, an elongated spider disposed in the tubular member, a heating coil wound around said spider, and means for retaining the spider in the tubular member, the spider in all but its extremities having its webs of less radial extent than the interior diameter of the tubular member, the webs at the extremities of the spider extending radially to abut the interior wall of the tubular member, the tubular member being provided with plates positioned in a common plane transverse to the tubular member and constituting abutments for the spider, the heating coil having its extremities disposed axially of the spider and retained in position to have such extremities abut said plates, the latter being provided with binding posts for connection with an electric energizing source. and means carried at the end of the tubular member to abut that end of the spider remote from the end adjacent said plates. LLOYD B. AMOO. 

